Window-sash lock.



L. HARRISON.

WINDOW SASH LOCK.

APPLICATION FILED APR. 18, 1911,

Patented Mar. 1'?, 1914.

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LEONARD HARRISON, OF W'ELLSBORO, PENNSYLVANIA.

WINDOW-SASH LOCK.

Specification of Letters Patent.

Application filed April 18, 1911.

Patented Mar. 17, 1914i.

Serial No. 621,928.

[o all who/nt 'it may concern:

Be it known that I, LEONARD Hannison, a citizen of the United States, and resident of lvl'yellsboro, Tioga county, State of Pennsylvania, have invented certain new and useful Improvements in Window-Sash Locks, of which the following is a specification.

It has been ,my object to make a sash fastener superior to others in strength and du rability and simplicity and one which will not jam or bind and which can not be tanipered with from the outside.

A. further object has been to make such a fastener permitting a free closing movement ot' the window without objectionable noise or rattling.

A further object of the invention is to provide a construction in which the casing of the lock is adapted to be driven into position after holes have been bored through the win; dow easing, the lock easing cutting away the material of the window casing and thereby providing a tight llit in the window casing and rendering the use of a chisel or other implement unnecessary.

It is a further object to so construct and arrange the parts of the lock that the operating key is rein( vable and the casing open at the front and rear, the parts carried b v the casing being adapted to be swung to a position out of the easing to provide a clear opening through tlie casing during the oper ation of driving the lock into position, so that the wood which is cut away may be readily removed from the casing and will not in any way damage or interfere with the working parts of the lock.

The novel features of the invention will be apparent from the following description, taken in connection with the drawings.

ln the drawings, Figure l is a face view :i a window having my invention applied thereto; Fig. 2 is a sectional view partly broken away showing a window sash lopked by my fastener; Fig. 3 is a rear view of the fastener and operating key with certain parts shown in section; Fig. 4t a cross seetion on the line l-fh of Fig. 3; Fig. 5 is a modified forni of locking rack on the sash.

As will be seen by reference to Fig. l., my invention is applicable to any ordinary form of window embodying a window fame 'l and any ordinary sashes, such as the lower sash 2 and the upper sash 3.

ln the preferred form of the invention the Window sash has placed on its edge metal rack bar l which preferably made of steel and which has tongues` 5 punched therefrom at interif'als, these tongues being bent inwardly at an angle to a point near the end and the end of the tongue being bent to a position substantially parallel with the face of the body portion of the rack, as will be seen by reference to Fig. Q. The window sash has holes t' bored therein to receive the inwardlv bent tongues 5 and the tongues lie in these holes [n eferably without actual oontact with the window sash being supported solely by their (,fonnection with the body portion of the rack bar il. rlhese tongues havo some resiliency and the object of the structure stated is to reduce the noise due to the movement of the sash over a spring pressed bolt which drops successively into the holes formed by punching out the tongues 5. The spring pressed bolt will ride up the inclined portion of the tongue and when it reaches the next notch in the bar it will be pushed out against the end of the tongue 5 but will not make the loud or rattling noise which is incident to the use of such bolts with solid rack bars. Ordinarily the .rack bar on the lower sash will be made with the teeth facing in an upward direction so that when the locking bolt engages that rack bar the sash can not be elevated any farther but it can be lowered or closed. ln the same way the upper rack bar has ratchet teeth facing downwardly so that the upper sash can not be lowered wit-houtreleasing the bolt but it: can be raised into closed position.

My preferred forni of locking bolt is shown inost clearly in Fig. Q and it will be seen that it is inclosed within the housing or easing T einbeiflded in the window frame in the same plane as the rack bar. This housing is preferably made of steel and is of elongated form having the circular ends 8 and the straight sides 9. It is open at the 't'ront and at the rear and the straight sides at the rear are beveled outwardly so as to form cutting edges 10 and the entire housing is slightly tapered from the front side to the rear side where the cutting edges 10 are located. l also preferably place around the trout edge a small outwarilly vflaring flange ill to make a smooth and perfect tit against the window frame when the housing is driven into position. The housing is placed in position on any ordinary window frame by boring tivo or more holes in the frame, one above the other, and driving the housing into position, the cutting edges at the proper posit-ion so that it can be 10 serving to remove that portion of the wood between the holes. After the housing is driven into position as shown in Fig. 2 nails 12- may be driven into the window frame through the ends near 'the top edge of the housing. lVithin this housing l place a bolt 13 with its outer edge substantially flush with the front of the housing or casing and extendii'ig practically from one end to the other. A pivot pin 14e passes through this bolt near one end and through the casing at a point as near to the top of the housing as possible and at the opposite end of the bolt there is a lug or projection 15 which serves to interlock with the rack on the sash. This lug extends out from the face of the window frame at substantially right angles being preferably made circular in cross section, A leaf spring 16 bears against the underside of the bolt 13, as shown in Fig. 2 and it is fastened at one end at the point 17 and is supported at 18 so as to make it tend to turn the bolt so as to project the lug 15 into contact with the rack bar. There is a radially curved projection 19 for operating the bolt near `the pivot and this projection is adapted to be engaged by a key for unlocking the bolt. There is also a stop 20 just above the projection 19 which is adapted to come into contact with the outer surface of the key so as to limit the outward movement of the bolt when the sash is moved beyond the bolt so as to uncover the latter.

The lock is provided with a removable key 21, which is rotatably mounted in the casing 21. When the lock is placed in position in the window frame the key 21 is removed and the bolt 13 and spring 1G are swung forwardly out of the casing and provide a clear opening therethrough which will permit the ready removal of the chips, which are cut from the window casing, so that they will not interfere with the work ing parts of the lock.

The key 21 for operating the bolt is made of tubular form but is semi-circular in cross section having a slot down one side. The operating projection 19 fits within said slot and the sides of the semi-circular key engage that projection on opposite sides to turn it when the key is rotated. The key itself is inserted through the side of the casing, the bolt having been turned onV its pivot against the iniuence of the spring so as to bring the projection 19 in proper position. In actual manufacture the keys are made suitciently long to be used with either the lower or the upper sashlock but since it takes a longer key for the upper sash than the lower, it is necessary to cut or break the key 'when it is applied to the lower sash and for this purpose a slot 22 is ordinarily cut part way through the key broken off but it leaves lsufficient material in the key to operate the upper bolt in case it is used for that purpose. The key has 'a circular thumb piece 23 on its end for operating it and it is inserted through a split ring thimble 24 which is circular in cross section and fits within the hole bored in the window frame. This thimble being in the form of a split ring can be driven into position and will fit tightly within'the hole so as to hold it in place. c

The two bolts, one for the upper and the other for the lower sash, are placed immediately adjacent the normal meeting line of the two sashes as shown in Fig. 1 and the only thing visible from within the room will be the heads 23 of the keys which operate the bolts. This location of the bolts pre- `vents any one tampering with them from the outside since they can not be reached unless the windows are wide open and it is therefore possible to raise the lower sash a short distance and lower the upper sash a short distance without rendering it pos' sible for any one on the outside to open either sash farther. The form of the -bolt entering the rack bar at right angles furthermore prevents any one from forcing any thin instrument up between the sash and the window frame to release the bolt since it is impossible for such an instrunient to get below the end of the bolt.

lt will be observed that the casing containing the bolt can be easily and quickly applied to any ordinary window frame by the use of nothing save a -gf bit and a hammer for driving the casing into position and that when it is in position it does not disliigure the window facing but is a neat construction occupying very little space. The pivot 14 being out practically at the edge of the window frame is almost in line with the project-ionr 15 which engages the rack and the consequence is that it is practically in line with the line of pull so that there is very little twisting action when the window engages the bolt. The result of this is not only increased strength and the avoidance of binding between the locking device and the window sash, but there is no such action as would tend to force outwardly the portion of the window frame to which it is secured. The locking arrangement furthermore is of such a construction that it Will operate properly and effectively whether the sash fits closely within the frame or is loose therein. The rack bar is applied to the window sash by simply boring a series of holes therein at the proper intervals and nailing the rack bar in place and it is obvious therefore that to apply my device to any Vwindow requires no material change in the Window sash or frame.

The locking bolt is not only applicable to the window sash operated by a weight 25, as shown in F ig. 2, but is also applicable to a window not using weights. In that instance the rack bar will be constructed as shown in Fig. 5, where the bar 9,6 simply has holes 27 therein at intervals with straight sided upper and lower walls. Holes 28 are bored in the window sash in line with the holes in the rack bar so that in this construction when the bolt enters a hole it will prevent the window from being moved either up or down.

Having described my invention what I claim as new and desire to secure by Letters- Patent is,

l. In a sash lock, the combination with an elongated casing open at the front and rear7 of a locking bolt pivotally mounted therein and having a projection on its front side and a pair of rearward projections radially arranged with respect to the pivot, a spring adapted to swing the bolt forwardly on said pivot, and a removable key rotatable in said easing and adapted to engage one of said rearward projections on either side so as to move the bolt forwardly or rearwardly by rotating the key, and the other of said rearward projections being arranged to en gage the key so as to limit the forward movement of the bolt, said bolt and spring being adapted to swing forwardly and thereby provide a substantially clear opening through the casing.

2. In a sash lock, the combination with an elongated casing open at the front and rear and tapering toward the rear, of a locking bolt arranged longitudinally of the casing and pivotally mounted at one end near the Yfront of the casing and having a right angular forward projection on its free end and a pair of rearward projections radially arranged with respect to the pivot, a spring mounted in said easing and engaging said bolt and adapted to move the free end thereof forwardlyl` and a removable key rotatable in said casing and adapted to engage one of said rearward projections on either side so as to move the bolt forwardly or rearwardly by rotating the key, said key normally permitting the bolt to swing on its pivot and the other of said rearward projections being arranged to engage the key so as to limit the forward movement of the bolt, said bolt and spring being adapted to swing forwardly and thereby provide a substantially clear opening through the casing.

In testimony whereof I affix my signature in presence of two witnesses.

LEONARD HARRISON. Witnesses:

GEO. A. l-IAIuusoN, GEO. WV. RIDDELL.

Copies ot this patent may be obtained for ve cents each, by addressing the Commissioner of Patents, Washington, D. C. 

